Gutke, Hans-Juergen; Braun, Norbert A.; Spitzner, Dietrich
Tetrahedron, 2004 , vol. 60, # 37 p. 8137 - 8141

Yang, Ming; Zhao, Yu-Ming; Zhang, Shu-Yu; Tu, Yong-Qiang; Zhang, Fu-Min
Chemistry - An Asian Journal, 2011 , vol. 6, # 6 p. 1344 - 1347